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level2">反射的应用场景了解么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java/basis/reflection.html#谈谈反射机制的优缺点" class="router-link-active router-link-exact-active toc-link level2">谈谈反射机制的优缺点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java/basis/reflection.html#反射实战" class="router-link-active router-link-exact-active toc-link level2">反射实战</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/java/basis/reflection.html#获取-class-对象的四种方式" class="router-link-active router-link-exact-active toc-link level3">获取 Class 对象的四种方式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java/basis/reflection.html#反射的一些基本操作" class="router-link-active router-link-exact-active toc-link level3">反射的一些基本操作</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><!--[--><h2 id="何为反射" tabindex="-1"><a class="header-anchor" href="#何为反射" aria-hidden="true">#</a> 何为反射？</h2><p>如果说大家研究过框架的底层原理或者咱们自己写过框架的话，一定对反射这个概念不陌生。</p><p>反射之所以被称为框架的灵魂，主要是因为它赋予了我们在运行时分析类以及执行类中方法的能力。</p><p>通过反射你可以获取任意一个类的所有属性和方法，你还可以调用这些方法和属性。</p><h2 id="反射的应用场景了解么" tabindex="-1"><a class="header-anchor" href="#反射的应用场景了解么" aria-hidden="true">#</a> 反射的应用场景了解么？</h2><p>像咱们平时大部分时候都是在写业务代码，很少会接触到直接使用反射机制的场景。</p><p>但是，这并不代表反射没有用。相反，正是因为反射，你才能这么轻松地使用各种框架。像 Spring/Spring Boot、MyBatis 等等框架中都大量使用了反射机制。</p><p><strong>这些框架中也大量使用了动态代理，而动态代理的实现也依赖反射。</strong></p><p>比如下面是通过 JDK 实现动态代理的示例代码，其中就使用了反射类 <code>Method</code> 来调用指定的方法。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">DebugInvocationHandler</span> <span class="token keyword">implements</span> <span class="token class-name">InvocationHandler</span> <span class="token punctuation">{</span>
    <span class="token doc-comment comment">/**
     * 代理类中的真实对象
     */</span>
    <span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token class-name">Object</span> target<span class="token punctuation">;</span>

    <span class="token keyword">public</span> <span class="token class-name">DebugInvocationHandler</span><span class="token punctuation">(</span><span class="token class-name">Object</span> target<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>target <span class="token operator">=</span> target<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>


    <span class="token keyword">public</span> <span class="token class-name">Object</span> <span class="token function">invoke</span><span class="token punctuation">(</span><span class="token class-name">Object</span> proxy<span class="token punctuation">,</span> <span class="token class-name">Method</span> method<span class="token punctuation">,</span> <span class="token class-name">Object</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">InvocationTargetException</span><span class="token punctuation">,</span> <span class="token class-name">IllegalAccessException</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;before method &quot;</span> <span class="token operator">+</span> method<span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token class-name">Object</span> result <span class="token operator">=</span> method<span class="token punctuation">.</span><span class="token function">invoke</span><span class="token punctuation">(</span>target<span class="token punctuation">,</span> args<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;after method &quot;</span> <span class="token operator">+</span> method<span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">return</span> result<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br></div></div><p>另外，像 Java 中的一大利器 <strong>注解</strong> 的实现也用到了反射。</p><p>为什么你使用 Spring 的时候 ，一个<code>@Component</code>注解就声明了一个类为 Spring Bean 呢？为什么你通过一个 <code>@Value</code>注解就读取到配置文件中的值呢？究竟是怎么起作用的呢？</p><p>这些都是因为你可以基于反射分析类，然后获取到类/属性/方法/方法的参数上的注解。你获取到注解之后，就可以做进一步的处理。</p><h2 id="谈谈反射机制的优缺点" tabindex="-1"><a class="header-anchor" href="#谈谈反射机制的优缺点" aria-hidden="true">#</a> 谈谈反射机制的优缺点</h2><p><strong>优点</strong> ： 可以让咱们的代码更加灵活、为各种框架提供开箱即用的功能提供了便利</p><p><strong>缺点</strong> ：让我们在运行时有了分析操作类的能力，这同样也增加了安全问题。比如可以无视泛型参数的安全检查（泛型参数的安全检查发生在编译时）。另外，反射的性能也要稍差点，不过，对于框架来说实际是影响不大的。相关阅读：<a href="https://stackoverflow.com/questions/1392351/java-reflection-why-is-it-so-slow" target="_blank" rel="noopener noreferrer">Java Reflection: Why is it so slow?<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h2 id="反射实战" tabindex="-1"><a class="header-anchor" href="#反射实战" aria-hidden="true">#</a> 反射实战</h2><h3 id="获取-class-对象的四种方式" tabindex="-1"><a class="header-anchor" href="#获取-class-对象的四种方式" aria-hidden="true">#</a> 获取 Class 对象的四种方式</h3><p>如果我们动态获取到这些信息，我们需要依靠 Class 对象。Class 类对象将一个类的方法、变量等信息告诉运行的程序。Java 提供了四种方式获取 Class 对象:</p><p><strong>1. 知道具体类的情况下可以使用：</strong></p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Class</span> alunbarClass <span class="token operator">=</span> <span class="token class-name">TargetObject</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br></div></div><p>但是我们一般是不知道具体类的，基本都是通过遍历包下面的类来获取 Class 对象，通过此方式获取 Class 对象不会进行初始化</p><p><strong>2. 通过 <code>Class.forName()</code>传入类的全路径获取：</strong></p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Class</span> alunbarClass1 <span class="token operator">=</span> <span class="token class-name">Class</span><span class="token punctuation">.</span><span class="token function">forName</span><span class="token punctuation">(</span><span class="token string">&quot;cn.javaguide.TargetObject&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br></div></div><p><strong>3. 通过对象实例<code>instance.getClass()</code>获取：</strong></p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">TargetObject</span> o <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">TargetObject</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Class</span> alunbarClass2 <span class="token operator">=</span> o<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p><strong>4. 通过类加载器<code>xxxClassLoader.loadClass()</code>传入类路径获取:</strong></p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Class</span> clazz <span class="token operator">=</span> <span class="token class-name">ClassLoader</span><span class="token punctuation">.</span><span class="token function">loadClass</span><span class="token punctuation">(</span><span class="token string">&quot;cn.javaguide.TargetObject&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br></div></div><p>通过类加载器获取 Class 对象不会进行初始化，意味着不进行包括初始化等一系列步骤，静态代码块和静态对象不会得到执行</p><h3 id="反射的一些基本操作" tabindex="-1"><a class="header-anchor" href="#反射的一些基本操作" aria-hidden="true">#</a> 反射的一些基本操作</h3><ol><li>创建一个我们要使用反射操作的类 <code>TargetObject</code>。</li></ol><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">cn<span class="token punctuation">.</span>javaguide</span><span class="token punctuation">;</span>

<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TargetObject</span> <span class="token punctuation">{</span>
    <span class="token keyword">private</span> <span class="token class-name">String</span> value<span class="token punctuation">;</span>

    <span class="token keyword">public</span> <span class="token class-name">TargetObject</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        value <span class="token operator">=</span> <span class="token string">&quot;JavaGuide&quot;</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">publicMethod</span><span class="token punctuation">(</span><span class="token class-name">String</span> s<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;I love &quot;</span> <span class="token operator">+</span> s<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">privateMethod</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;value is &quot;</span> <span class="token operator">+</span> value<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br></div></div><ol start="2"><li>使用反射操作这个类的方法以及参数</li></ol><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">cn<span class="token punctuation">.</span>javaguide</span><span class="token punctuation">;</span>

<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>lang<span class="token punctuation">.</span>reflect<span class="token punctuation">.</span></span><span class="token class-name">Field</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>lang<span class="token punctuation">.</span>reflect<span class="token punctuation">.</span></span><span class="token class-name">InvocationTargetException</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>lang<span class="token punctuation">.</span>reflect<span class="token punctuation">.</span></span><span class="token class-name">Method</span><span class="token punctuation">;</span>

<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Main</span> <span class="token punctuation">{</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">ClassNotFoundException</span><span class="token punctuation">,</span> <span class="token class-name">NoSuchMethodException</span><span class="token punctuation">,</span> <span class="token class-name">IllegalAccessException</span><span class="token punctuation">,</span> <span class="token class-name">InstantiationException</span><span class="token punctuation">,</span> <span class="token class-name">InvocationTargetException</span><span class="token punctuation">,</span> <span class="token class-name">NoSuchFieldException</span> <span class="token punctuation">{</span>
        <span class="token doc-comment comment">/**
         * 获取 TargetObject 类的 Class 对象并且创建 TargetObject 类实例
         */</span>
        <span class="token class-name">Class</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token operator">?</span><span class="token punctuation">&gt;</span></span> tagetClass <span class="token operator">=</span> <span class="token class-name">Class</span><span class="token punctuation">.</span><span class="token function">forName</span><span class="token punctuation">(</span><span class="token string">&quot;cn.javaguide.TargetObject&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token class-name">TargetObject</span> targetObject <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">TargetObject</span><span class="token punctuation">)</span> tagetClass<span class="token punctuation">.</span><span class="token function">newInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token doc-comment comment">/**
         * 获取 TargetObject 类中定义的所有方法
         */</span>
        <span class="token class-name">Method</span><span class="token punctuation">[</span><span class="token punctuation">]</span> methods <span class="token operator">=</span> targetClass<span class="token punctuation">.</span><span class="token function">getDeclaredMethods</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token class-name">Method</span> method <span class="token operator">:</span> methods<span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>method<span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>

        <span class="token doc-comment comment">/**
         * 获取指定方法并调用
         */</span>
        <span class="token class-name">Method</span> publicMethod <span class="token operator">=</span> targetClass<span class="token punctuation">.</span><span class="token function">getDeclaredMethod</span><span class="token punctuation">(</span><span class="token string">&quot;publicMethod&quot;</span><span class="token punctuation">,</span>
                <span class="token class-name">String</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

        publicMethod<span class="token punctuation">.</span><span class="token function">invoke</span><span class="token punctuation">(</span>targetObject<span class="token punctuation">,</span> <span class="token string">&quot;JavaGuide&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

        <span class="token doc-comment comment">/**
         * 获取指定参数并对参数进行修改
         */</span>
        <span class="token class-name">Field</span> field <span class="token operator">=</span> targetClass<span class="token punctuation">.</span><span class="token function">getDeclaredField</span><span class="token punctuation">(</span><span class="token string">&quot;value&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">//为了对类中的参数进行修改我们取消安全检查</span>
        field<span class="token punctuation">.</span><span class="token function">setAccessible</span><span class="token punctuation">(</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        field<span class="token punctuation">.</span><span class="token function">set</span><span class="token punctuation">(</span>targetObject<span class="token punctuation">,</span> <span class="token string">&quot;JavaGuide&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

        <span class="token doc-comment comment">/**
         * 调用 private 方法
         */</span>
        <span class="token class-name">Method</span> privateMethod <span class="token operator">=</span> targetClass<span class="token punctuation">.</span><span class="token function">getDeclaredMethod</span><span class="token punctuation">(</span><span class="token string">&quot;privateMethod&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">//为了调用private方法我们取消安全检查</span>
        privateMethod<span class="token punctuation">.</span><span class="token function">setAccessible</span><span class="token punctuation">(</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        privateMethod<span class="token punctuation">.</span><span class="token function">invoke</span><span class="token punctuation">(</span>targetObject<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br></div></div><p>输出内容：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>publicMethod
privateMethod
I love JavaGuide
value is JavaGuide
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p><strong>注意</strong> : 有读者提到上面代码运行会抛出 <code>ClassNotFoundException</code> 异常,具体原因是你没有下面把这段代码的包名替换成自己创建的 <code>TargetObject</code> 所在的包 。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Class</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token operator">?</span><span class="token punctuation">&gt;</span></span> targetClass <span class="token operator">=</span> <span class="token class-name">Class</span><span class="token punctuation">.</span><span class="token function">forName</span><span class="token punctuation">(</span><span class="token string">&quot;cn.javaguide.TargetObject&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br></div></div><!--]--></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/Snailclimb/JavaGuide/edit/main/docs/java/basis/reflection.md" rel="noopener noreferrer" target="_blank" arialabel="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" arialabelledby="edit"><title id="edit" lang="en">edit icon</title><g fill="currentColor"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></g></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/3/30 10:52:33</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: koushuangbwcx@163.com">guide</span>,<!--]--><!--[--><span class="contributor" title="email: sam2008ext@gmail.com">sam</span>,<!--]--><!--[--><span class="contributor" title="email: koushuangbwcx@163.com">Guide哥</span>,<!--]--><!--[--><span class="contributor" title="email: 39112652+Itswag@users.noreply.github.com">Sr</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/java/basis/serialization.html" class="nav-link prev" arialabel="Java 序列化详解"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Java 序列化详解</div></a><a href="/java/basis/proxy.html" class="nav-link next" arialabel="Java 代理模式详解"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Java 代理模式详解<!----></div></a></nav><!----><!----></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">鄂ICP备2020015769号-1</a></div><div class="copyright">Copyright © 2022 Guide</div></footer></div><!--]--><!----><!--]--></div>
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